I'm looking for pointers (past experience in particular) for sizing a mail
server for a large-ish mail install based on postfix, cyrus, amavisd-new,
clamav, spamassassin, and web mail (most likely imp) serving around 100k
mailboxes. I estimate I'll need to be able to pass through the whole
chain around 40msgs/sec continuously to be on the safe side. If possible,
I'd like to do this on a single server. Cyrus murder probably isn't an
option, but I think I could swing a separate box to do the content
filtering. Would, say, a 4-cpu Xeon with ~8GB RAM suffice for the
MTA/IMAP combination?